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INO thermodynamic properties and ultraviolet spectrum
Author(s) -
Forte E.,
Hippler H.,
Van Den Bergh H.
Publication year - 1981
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550131203
Subject(s) - chemistry , ultraviolet , equilibrium constant , absorption spectroscopy , analytical chemistry (journal) , absorption (acoustics) , organic chemistry , optoelectronics , physics , quantum mechanics , acoustics
The equilibrium I 2 ( g ) + 2NO( g ) = 2INO( g ) has been studied at room temperature by ultraviolet absorption spectroscopy. The equilibrium constant has been measured as K p = (2.7 ± 0.3) × 10 −6 atm −1 at 298 K. Third‐law calculations lead to Δ H ° f ,298 (INO) = 120.0 ± 0.3 kJ/mol. The relative absorption spectrum of INO has been measured between 225 and 300 nm. Quantitative measurements gave ϵ(λ max = 238 nm) = (1.79 ± 0.5) × 10 4 L/mol·cm and ϵ(410 nm) = 234.7 ± 21 L/mol·cm.